1/* 2 * shmob_drm_drv.c -- SH Mobile DRM driver 3 * 4 * Copyright (C) 2012 Renesas Electronics Corporation 5 * 6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14#include <linux/clk.h> 15#include <linux/io.h> 16#include <linux/mm.h> 17#include <linux/module.h> 18#include <linux/platform_device.h> 19#include <linux/pm.h> 20#include <linux/slab.h> 21 22#include <drm/drmP.h> 23#include <drm/drm_crtc_helper.h> 24#include <drm/drm_gem_cma_helper.h> 25 26#include "shmob_drm_crtc.h" 27#include "shmob_drm_drv.h" 28#include "shmob_drm_kms.h" 29#include "shmob_drm_plane.h" 30#include "shmob_drm_regs.h" 31 32/* ----------------------------------------------------------------------------- 33 * Hardware initialization 34 */ 35 36static int shmob_drm_init_interface(struct shmob_drm_device *sdev) 37{ 38 static const u32 ldmt1r[] = { 39 [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, 40 [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, 41 [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, 42 [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, 43 [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, 44 [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, 45 [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, 46 [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, 47 [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, 48 [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, 49 [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, 50 [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, 51 [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, 52 [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, 53 [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, 54 [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, 55 [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, 56 [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, 57 [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, 58 }; 59 60 if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { 61 dev_err(sdev->dev, "invalid interface type %u\n", 62 sdev->pdata->iface.interface); 63 return -EINVAL; 64 } 65 66 sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; 67 return 0; 68} 69 70static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, 71 enum shmob_drm_clk_source clksrc) 72{ 73 struct clk *clk; 74 char *clkname; 75 76 switch (clksrc) { 77 case SHMOB_DRM_CLK_BUS: 78 clkname = "bus_clk"; 79 sdev->lddckr = LDDCKR_ICKSEL_BUS; 80 break; 81 case SHMOB_DRM_CLK_PERIPHERAL: 82 clkname = "peripheral_clk"; 83 sdev->lddckr = LDDCKR_ICKSEL_MIPI; 84 break; 85 case SHMOB_DRM_CLK_EXTERNAL: 86 clkname = NULL; 87 sdev->lddckr = LDDCKR_ICKSEL_HDMI; 88 break; 89 default: 90 return -EINVAL; 91 } 92 93 clk = devm_clk_get(sdev->dev, clkname); 94 if (IS_ERR(clk)) { 95 dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); 96 return PTR_ERR(clk); 97 } 98 99 sdev->clock = clk; 100 return 0; 101} 102 103/* ----------------------------------------------------------------------------- 104 * DRM operations 105 */ 106 107static int shmob_drm_unload(struct drm_device *dev) 108{ 109 drm_kms_helper_poll_fini(dev); 110 drm_mode_config_cleanup(dev); 111 drm_vblank_cleanup(dev); 112 drm_irq_uninstall(dev); 113 114 dev->dev_private = NULL; 115 116 return 0; 117} 118 119static int shmob_drm_load(struct drm_device *dev, unsigned long flags) 120{ 121 struct shmob_drm_platform_data *pdata = dev->dev->platform_data; 122 struct platform_device *pdev = dev->platformdev; 123 struct shmob_drm_device *sdev; 124 struct resource *res; 125 unsigned int i; 126 int ret; 127 128 if (pdata == NULL) { 129 dev_err(dev->dev, "no platform data\n"); 130 return -EINVAL; 131 } 132 133 sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); 134 if (sdev == NULL) { 135 dev_err(dev->dev, "failed to allocate private data\n"); 136 return -ENOMEM; 137 } 138 139 sdev->dev = &pdev->dev; 140 sdev->pdata = pdata; 141 spin_lock_init(&sdev->irq_lock); 142 143 sdev->ddev = dev; 144 dev->dev_private = sdev; 145 146 /* I/O resources and clocks */ 147 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 148 if (res == NULL) { 149 dev_err(&pdev->dev, "failed to get memory resource\n"); 150 return -EINVAL; 151 } 152 153 sdev->mmio = devm_ioremap_nocache(&pdev->dev, res->start, 154 resource_size(res)); 155 if (sdev->mmio == NULL) { 156 dev_err(&pdev->dev, "failed to remap memory resource\n"); 157 return -ENOMEM; 158 } 159 160 ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); 161 if (ret < 0) 162 return ret; 163 164 ret = shmob_drm_init_interface(sdev); 165 if (ret < 0) 166 return ret; 167 168 ret = shmob_drm_modeset_init(sdev); 169 if (ret < 0) { 170 dev_err(&pdev->dev, "failed to initialize mode setting\n"); 171 return ret; 172 } 173 174 for (i = 0; i < 4; ++i) { 175 ret = shmob_drm_plane_create(sdev, i); 176 if (ret < 0) { 177 dev_err(&pdev->dev, "failed to create plane %u\n", i); 178 goto done; 179 } 180 } 181 182 ret = drm_vblank_init(dev, 1); 183 if (ret < 0) { 184 dev_err(&pdev->dev, "failed to initialize vblank\n"); 185 goto done; 186 } 187 188 ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0)); 189 if (ret < 0) { 190 dev_err(&pdev->dev, "failed to install IRQ handler\n"); 191 goto done; 192 } 193 194 platform_set_drvdata(pdev, sdev); 195 196done: 197 if (ret) 198 shmob_drm_unload(dev); 199 200 return ret; 201} 202 203static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file) 204{ 205 struct shmob_drm_device *sdev = dev->dev_private; 206 207 shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file); 208} 209 210static irqreturn_t shmob_drm_irq(int irq, void *arg) 211{ 212 struct drm_device *dev = arg; 213 struct shmob_drm_device *sdev = dev->dev_private; 214 unsigned long flags; 215 u32 status; 216 217 /* Acknowledge interrupts. Putting interrupt enable and interrupt flag 218 * bits in the same register is really brain-dead design and requires 219 * taking a spinlock. 220 */ 221 spin_lock_irqsave(&sdev->irq_lock, flags); 222 status = lcdc_read(sdev, LDINTR); 223 lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); 224 spin_unlock_irqrestore(&sdev->irq_lock, flags); 225 226 if (status & LDINTR_VES) { 227 drm_handle_vblank(dev, 0); 228 shmob_drm_crtc_finish_page_flip(&sdev->crtc); 229 } 230 231 return IRQ_HANDLED; 232} 233 234static int shmob_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) 235{ 236 struct shmob_drm_device *sdev = dev->dev_private; 237 238 shmob_drm_crtc_enable_vblank(sdev, true); 239 240 return 0; 241} 242 243static void shmob_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) 244{ 245 struct shmob_drm_device *sdev = dev->dev_private; 246 247 shmob_drm_crtc_enable_vblank(sdev, false); 248} 249 250static const struct file_operations shmob_drm_fops = { 251 .owner = THIS_MODULE, 252 .open = drm_open, 253 .release = drm_release, 254 .unlocked_ioctl = drm_ioctl, 255#ifdef CONFIG_COMPAT 256 .compat_ioctl = drm_compat_ioctl, 257#endif 258 .poll = drm_poll, 259 .read = drm_read, 260 .llseek = no_llseek, 261 .mmap = drm_gem_cma_mmap, 262}; 263 264static struct drm_driver shmob_drm_driver = { 265 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET 266 | DRIVER_PRIME, 267 .load = shmob_drm_load, 268 .unload = shmob_drm_unload, 269 .preclose = shmob_drm_preclose, 270 .set_busid = drm_platform_set_busid, 271 .irq_handler = shmob_drm_irq, 272 .get_vblank_counter = drm_vblank_no_hw_counter, 273 .enable_vblank = shmob_drm_enable_vblank, 274 .disable_vblank = shmob_drm_disable_vblank, 275 .gem_free_object = drm_gem_cma_free_object, 276 .gem_vm_ops = &drm_gem_cma_vm_ops, 277 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 278 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 279 .gem_prime_import = drm_gem_prime_import, 280 .gem_prime_export = drm_gem_prime_export, 281 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 282 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, 283 .gem_prime_vmap = drm_gem_cma_prime_vmap, 284 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 285 .gem_prime_mmap = drm_gem_cma_prime_mmap, 286 .dumb_create = drm_gem_cma_dumb_create, 287 .dumb_map_offset = drm_gem_cma_dumb_map_offset, 288 .dumb_destroy = drm_gem_dumb_destroy, 289 .fops = &shmob_drm_fops, 290 .name = "shmob-drm", 291 .desc = "Renesas SH Mobile DRM", 292 .date = "20120424", 293 .major = 1, 294 .minor = 0, 295}; 296 297/* ----------------------------------------------------------------------------- 298 * Power management 299 */ 300 301#ifdef CONFIG_PM_SLEEP 302static int shmob_drm_pm_suspend(struct device *dev) 303{ 304 struct shmob_drm_device *sdev = dev_get_drvdata(dev); 305 306 drm_kms_helper_poll_disable(sdev->ddev); 307 shmob_drm_crtc_suspend(&sdev->crtc); 308 309 return 0; 310} 311 312static int shmob_drm_pm_resume(struct device *dev) 313{ 314 struct shmob_drm_device *sdev = dev_get_drvdata(dev); 315 316 drm_modeset_lock_all(sdev->ddev); 317 shmob_drm_crtc_resume(&sdev->crtc); 318 drm_modeset_unlock_all(sdev->ddev); 319 320 drm_kms_helper_poll_enable(sdev->ddev); 321 return 0; 322} 323#endif 324 325static const struct dev_pm_ops shmob_drm_pm_ops = { 326 SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) 327}; 328 329/* ----------------------------------------------------------------------------- 330 * Platform driver 331 */ 332 333static int shmob_drm_probe(struct platform_device *pdev) 334{ 335 return drm_platform_init(&shmob_drm_driver, pdev); 336} 337 338static int shmob_drm_remove(struct platform_device *pdev) 339{ 340 struct shmob_drm_device *sdev = platform_get_drvdata(pdev); 341 342 drm_put_dev(sdev->ddev); 343 344 return 0; 345} 346 347static struct platform_driver shmob_drm_platform_driver = { 348 .probe = shmob_drm_probe, 349 .remove = shmob_drm_remove, 350 .driver = { 351 .name = "shmob-drm", 352 .pm = &shmob_drm_pm_ops, 353 }, 354}; 355 356module_platform_driver(shmob_drm_platform_driver); 357 358MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); 359MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); 360MODULE_LICENSE("GPL"); 361